Year Percent 2000 94.1534 2001 94.3646 2002 94.57094 2003 94.77248 2004 94.96918 2005 95.161 2006 95.34802 2007 95.52609 2008 95.69785 2009 95.86551 2010 96.02922 2011 96.18896 2012 96.34392 2013 96.49454 2014 96.64163 2015 96.78511 2016 96.92508 2017 97.06151 2018 97.19434 2019 97.32361 2020 97.44948 2021 97.57192 2022 97.69119